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| author | Tejun Heo <htejun@gmail.com> | 2007-01-20 16:00:26 +0900 |
|---|---|---|
| committer | Jeff Garzik <jeff@garzik.org> | 2007-02-09 17:39:36 -0500 |
| commit | 9ac7849e35f705830f7b016ff272b0ff1f7ff759 (patch) | |
| tree | 7f17cdff87e154937a15cc2ec8da9b4e6018ce8e /drivers/base/Kconfig | |
| parent | 77a527eadb425b60db3f5f0aae6a4c51c38e35e5 (diff) | |
| download | linux-9ac7849e35f705830f7b016ff272b0ff1f7ff759.tar.gz | |
devres: device resource management
Implement device resource management, in short, devres. A device driver can allocate arbirary size of devres data which is associated with a release function. On driver detach, release function is invoked on the devres data, then, devres data is freed. devreses are typed by associated release functions. Some devreses are better represented by single instance of the type while others need multiple instances sharing the same release function. Both usages are supported. devreses can be grouped using devres group such that a device driver can easily release acquired resources halfway through initialization or selectively release resources (e.g. resources for port 1 out of 4 ports). This patch adds devres core including documentation and the following managed interfaces. * alloc/free : devm_kzalloc(), devm_kzfree() * IO region : devm_request_region(), devm_release_region() * IRQ : devm_request_irq(), devm_free_irq() * DMA : dmam_alloc_coherent(), dmam_free_coherent(), dmam_declare_coherent_memory(), dmam_pool_create(), dmam_pool_destroy() * PCI : pcim_enable_device(), pcim_pin_device(), pci_is_managed() * iomap : devm_ioport_map(), devm_ioport_unmap(), devm_ioremap(), devm_ioremap_nocache(), devm_iounmap(), pcim_iomap_table(), pcim_iomap(), pcim_iounmap() Signed-off-by: Tejun Heo <htejun@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
Diffstat (limited to 'drivers/base/Kconfig')
| -rw-r--r-- | drivers/base/Kconfig | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index 1429f3a2629e..5d6312e33490 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -37,6 +37,18 @@ config DEBUG_DRIVER If you are unsure about this, say N here. +config DEBUG_DEVRES + bool "Managed device resources verbose debug messages" + depends on DEBUG_KERNEL + help + This option enables kernel parameter devres.log. If set to + non-zero, devres debug messages are printed. Select this if + you are having a problem with devres or want to debug + resource management for a managed device. devres.log can be + switched on and off from sysfs node. + + If you are unsure about this, Say N here. + config SYS_HYPERVISOR bool default n |